:root{font-family:system-ui,-apple-system,'Segoe UI',sans-serif;color:#17233d;background:#f5f7fc}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button{cursor:pointer;border:0}a{color:#315be9}#root{min-height:100vh}.shell{display:flex;min-height:100vh}.side{width:245px;background:#fff;border-right:1px solid #e7ebf3;padding:26px 16px;position:sticky;top:0;height:100vh;flex-shrink:0}.brand{font-size:20px;font-weight:850;letter-spacing:-.6px;margin-bottom:25px}.brand small{display:block;font-size:12px;font-weight:500;color:#7d8aa0;margin-top:5px}.nav{display:block;width:100%;text-align:left;padding:13px 14px;background:transparent;color:#526079;border-radius:12px;margin-bottom:6px}.nav.active,.nav:hover{background:#eaf0ff;color:#2452d9;font-weight:750}.main{width:100%;max-width:1120px;padding:35px 36px;margin:0 auto}.top{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:26px}h1{font-size:32px;letter-spacing:-1px;margin:0 0 9px}h2{font-size:22px;letter-spacing:-.5px;margin:0 0 15px}h3{margin:0 0 10px;font-size:18px}.muted{color:#75829b}.eyebrow{font-size:12px;font-weight:750;text-transform:uppercase;letter-spacing:1.5px;color:#5071d4;margin-bottom:8px}.card{background:#fff;border:1px solid #e7ebf3;border-radius:19px;padding:23px;margin-bottom:16px;box-shadow:0 5px 22px #1b315608}.hero{background:linear-gradient(115deg,#e8eeff,#fff 70%);padding:28px}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.tag{display:inline-block;background:#edf1fc;color:#536a9d;padding:6px 11px;border-radius:30px;font-size:12px;font-weight:700}.btn{background:#3565e9;color:white;border-radius:11px;padding:11px 17px;font-weight:700}.btn.secondary{background:#eaf0ff;color:#315be9}.btn.plain{background:#f1f3f8;color:#526079}.btn:disabled{opacity:.5}.btn+.btn{margin-left:8px}.actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:16px}.actions .btn+.btn{margin:0}.input{width:100%;padding:12px 14px;border:1px solid #dce2ee;border-radius:11px;background:white;margin:7px 0 14px}.input:focus{outline:2px solid #c3d2ff}textarea.input{min-height:100px;resize:vertical}.reading{white-space:pre-line;line-height:1.8;font-size:16px;color:#37445d}.links a{display:inline-block;margin:5px 10px 5px 0}.steps{line-height:1.8;padding-left:23px}.item{border:1px solid #e9edf5;padding:17px;border-radius:14px;margin:12px 0;background:#fff}.notice{padding:12px 15px;background:#edf4ff;border-radius:12px;color:#355aa2;margin:12px 0}.login{max-width:420px;margin:10vh auto;padding:32px}.login .brand{font-size:26px}.badge{display:inline-block;font-size:12px;font-weight:800;padding:5px 10px;background:#e8f8ed;color:#20804b;border-radius:20px}.pill{background:#fff;padding:9px 12px;border:1px solid #e7ebf3;border-radius:12px;font-size:13px}.mobileNav{display:none}.pre{white-space:pre-line}.error{color:#b12b3b}.success{color:#1b8553}.progressbar{height:10px;background:#dce5ff;border-radius:15px;overflow:hidden;margin-top:10px}.progressbar>div{height:100%;background:#4c73ed}.footer{color:#94a0b1;font-size:12px;margin-top:28px}@media(max-width:780px){.side{display:none}.main{padding:20px 16px 95px}.grid{grid-template-columns:1fr}.top{align-items:flex-start}h1{font-size:26px}.mobileNav{display:flex;position:fixed;bottom:0;left:0;right:0;background:white;border-top:1px solid #e5e9f2;padding:7px 3px;z-index:5;justify-content:space-around}.mobileNav button{background:none;font-size:11px;color:#64718a;padding:8px 4px}.mobileNav button.active{color:#2452d9;font-weight:800}.card{padding:18px}.login{margin:8vh 14px}}

/* Idea Lab v0.2 — visual-first learning */
.hero{position:relative;overflow:hidden;padding-right:180px}.hero-deco{position:absolute;right:28px;top:40px;font-size:52px;transform:rotate(-8deg);filter:drop-shadow(0 12px 12px #5977b433)}.hero-deco span{font-size:32px}.discovery-card{overflow:hidden}.discovery-thumb{background:linear-gradient(135deg,#dce9ff,#f0e9ff);border-radius:15px;min-height:135px;margin:-5px -5px 18px;display:flex;align-items:center;justify-content:center;flex-direction:column;font-size:56px;gap:8px}.discovery-thumb span{font-size:21px;letter-spacing:10px}.visual-hero{background:linear-gradient(135deg,#e5f1ff 0%,#f1edff 70%,#fff4e7 100%);padding:27px;border-radius:20px;margin:22px 0 28px}.visual-kicker{font-size:12px;font-weight:850;letter-spacing:1.5px;color:#5168b2}.visual-title{font-size:26px;font-weight:850;letter-spacing:-.5px;margin-top:10px}.visual-hero p{color:#5e6a82;line-height:1.5}.visual-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:24px}.visual-steps.tiles{grid-template-columns:repeat(2,minmax(0,1fr))}.visual-step{background:#ffffffd9;min-height:116px;border:1px solid #ffffff;border-radius:16px;padding:16px 10px;text-align:center;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:9px;box-shadow:0 5px 18px #3559a00c}.visual-emoji{font-size:39px}.visual-step strong{font-size:13px;color:#354561}.reading-layout .reading{max-width:820px;font-size:17px;line-height:1.85}.explore-question{background:#fff7e8;border:1px solid #ffebbd;border-radius:17px;padding:21px;margin:28px 0}.explore-question>span{font-size:12px;letter-spacing:1px;color:#a47628;font-weight:850}.explore-question h3{margin:10px 0}.explore-question p{line-height:1.6;color:#705f46}.deep-dive{background:#f2f6ff;border:1px solid #e1eaff;border-radius:15px;margin:20px 0;padding:18px}.deep-dive summary{cursor:pointer;font-weight:800}.deep-dive p{line-height:1.7;color:#53617c}.mission-visual{background:linear-gradient(110deg,#e4f1ff,#f2e9ff);border-radius:15px;padding:22px;font-size:48px;display:flex;gap:22px;align-items:center;margin-bottom:20px}.mission-visual span{font-size:22px;font-weight:850;color:#344b81}.mission-card .steps{max-width:800px}.reading-layout{max-width:100%}@media(max-width:900px){.hero{padding-right:28px}.hero-deco{display:none}}@media(max-width:580px){.visual-steps,.visual-steps.tiles{grid-template-columns:repeat(2,minmax(0,1fr))}.visual-title{font-size:21px}.visual-step{min-height:105px}.visual-hero{padding:17px}.visual-emoji{font-size:30px}.mission-visual span{font-size:17px}.discovery-thumb{min-height:110px}}

/* v0.3: actual illustrations and readable visual chapters */
.photo-thumb{padding:0;overflow:hidden;min-height:190px;background:#eaf2ff}.photo-thumb img{display:block;width:100%;height:190px;object-fit:cover}.article-figure{margin:12px 0 26px}.article-figure img{width:100%;height:auto;display:block;border-radius:18px;border:1px solid #e5ebfa}.article-figure figcaption{font-size:13px;color:#74819c;padding:9px 3px}.reading-cards{display:grid;gap:12px}.reading-part{display:flex;gap:17px;align-items:flex-start;background:#f8faff;border:1px solid #e9eef9;border-radius:15px;padding:16px 18px}.reading-part p{margin:0;white-space:normal;line-height:1.7}.reading-count{flex-shrink:0;background:#e7eeff;color:#436bd1;border-radius:10px;padding:3px 8px;font-size:12px;font-weight:800;line-height:1.6}.discovery-card .btn{margin-top:auto}.discovery-card{display:flex;flex-direction:column}.discovery-card .tag{align-self:flex-start}.discovery-card .muted{flex:1}@media(max-width:580px){.photo-thumb img{height:150px}.reading-part{padding:13px;gap:10px}.article-figure figcaption{font-size:12px}}

/* v0.4: repaired illustrations and practical video discovery */
.media-guide{display:flex;gap:22px;align-items:center;background:#eef5ff;border:1px solid #dbe8ff;border-radius:18px;padding:24px;margin:22px 0}.media-guide-icon{display:grid;place-items:center;width:78px;height:78px;flex:0 0 78px;border-radius:20px;background:linear-gradient(135deg,#3d6ef1,#7297ff);color:white;font-size:32px;box-shadow:0 12px 25px #3d6ef12e}.media-guide p{color:#5c6d88;line-height:1.5}.media-link{display:inline-block;text-decoration:none;margin-top:4px}@media(max-width:580px){.media-guide{padding:17px;gap:14px}.media-guide-icon{width:52px;height:52px;flex-basis:52px;font-size:23px}}